Island



(No Model) 3 Sheets-Sheen 1.

J. B. DAYMONT. WEFT PILE CUTTING MACHINE; NO. 606,406. Patented June28, 1898.

WITNESSES INl/EN T019 M 6 M s/m2 A TTOHNEIS (No Model.) 3 SheetsSheet 2.

J.B.D AYM 0 NT. WEFT PILE CUTTING. MACHINE.

No. 606,406. Patented June 28,1898.

I" ll" H WITNESSES INVENTOI? d TTORNEJG (No Model.) 3 Sheets-Sheet 3.

J. B. DAYMONT. WEFT PILE CUTTING MACHINE.

No. 606,406. Patented June 28,1898

IN VE N TOR $72723 Daymmi.

A TTORIVEYS tion, however, is in'no wise essential to the JOHN B. DAYMONT, OF OROMPTON,

PATENT RI-IODE ISLAND, ASSIGNOR TO THE CROMPTON COMPANY, OF 'SAMEPLACE.

WEFT-PlLE CUTTlNG MACHINE.

SPECIFICATION forming 5m of Letters P atent No. 606,406, dated June 28, 1898.

Application filed April 29, 1897.

T0 ctZZ whom it may concern:

Be it known that I, JOHN B. DAYMONT, of Crompton, in the county of Kent and State of Rhode Island, have inventedcertain new and useful Improvements in Weft-Pile-Outting Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to machines for cutting the loops of weft pile fabrics. It will be described first with reference to the accompanyin g drawings, in which latter I have illustrated the best embodiment which I have contrived, after which the distinguishing characteristics thereof will be particularly pointed out and distinctly defined in the claimsat the close of this specification.

In the drawings, Figure 1 is a side elevation of a machine containing the said embodiment of the invention. Fig. 2 is a top view or plan of the said machine. Fig. 3 is a perspective, on an enlargedscale, of certain details, the said view being intended to show more particularly the devices which are concerned in effecting the cross-feed of the knifeholder. Fig. 4 is a similar view intended to show more particularly the details of the knife controlling mechanism. Figs. 5, 6, and 7 are detail views to which reference is made hereinafter.

A A are the end frames of the illustrated machine, one of said end frames being shown higher than the other in order to give to the portion of the. cloth which is stretched in position for being out an inclination downward from the rear or feeding end of the machine toward the other or front end. This inclinainvention. 4

O G are side beams or girths that connect the two end frames together. The said side beams or girths support the bearings for the driving-shaft D,segment-shaft F,and grooved pulley-shaft II, the two latter shafts extending across the machine and having bearings on the opposite side.

The top bars B B support the guide-bars S for the knife-carriage E, the machine being are No. 634,373. on model.)

I of the class in which the cloth is held stationary while beingcut and the knife moved over the surface of it. A short section of one of these guide-bars S is shown in Fig. 3, and also one end of the knife-carriage E. This carriage E consists, essentially, ofa plate that extends across the machine and has widened ends that slide in the grooves CtOf the guide-bars S. The carriage is moved nearly the length of the machine and back by suitable actuating connections,fwhereby the required reciprocating movements are communicated thereto. In the present case I have shown ropes or chains J J, each of which has one end of the same attached to one side of the carriage, the said rope or chain then being carried over the pulley cl at the front or right-hand end of the machine, then being given one or more turns around one of the grooved pulleys K on shaft H, and then being passed up over a pulley d at the rear or left-hand end of the machine and back to the carriage E again, and having its other end made fast to the latter. There is arope at each side of themachine, both being alike in arrangement and operation, the object in using the two ropes or chains, located as stated and shown, being to secure a uniform motion of both ends of the carriage.

A short shaft D is mounted in a bearing on the upper beam or girth O on one side of the machine, Figs. 1 and 2, and is driven by a band applied tothe pulleys L on its outer end. The inner end of shaft ,H has an arm 71, the latter having a slot in the outer end of the same, in which slot a crank-pin o is received, the said crank-pin being secured adjustably in said slot by means of a nut and washer. One end of a rod 'n is connected to this crankpin 12, and the other end of said rod is connected to a stud c on an army of .the segment-gear M, the said segment-gear being fast on shaft F. The segment-gear M engages in a gear 0 on the shaft H, carrying the fgrooved pulleys K K, which are described ing movement of increased extent, and thereby are occasioned the reciprocations of the knife-carriage E to the extent of the length of the machine. The crank-arm 7i in passing the centers starts and stops the carriage so grad ually as to avoid shock to the knife mechanism and allow a high speed of working to be attained. A screw N'is held in bearings that are located at the opposite ends of the carriage E, and a wheel Pis made fast on this screw to enable the latter to be-turned to feed the knife-holder across the machine. The turning of the screw to feed the knife-holder may be effected in various ways. In the drawings I have shown a bar h, preferably toothed to constitute a rack, in which case the wheel P is toothed also, which bar or rack is upheld by springs e e, the said bar or rack being located at the side of one of the top bars B near one end of the machine, herein the rear or left-hand end of the machine, and in the path along which wheel P moves in the reciprocations of the carriage E. The springs e 6 allow the bar or rack h to be depressed at certain times by the action of a cam-bar g, Figs. 1 and 3, which is pivoted on a pin on the end of the carriage E. In the movement of the carriage E to the left in the drawings the cam-bar Q will bear by its free extremity upon a plate vi, located on the inner side of the bar or rack 71, (see Fig. 3) and push the bar or rack h down, so that it will not engage with the wheel or gear P, and the said wheel and the screw N will not be turned; but in the return movement of carriage E the cam-bar 9, when it strikes the plate 17, will be tripped and swung backwardly by its first contact with the bar or rack, as shown by dotted lines in Fig. 3, so that it will not operate to depress the bar or rack, and consequently the bar or rack will be held up by the springs e e and will engage with the wheel or gear P, thereby turning the screw N and feeding the knife-holder a little toward the other side of the machine into position to cut the next row of loops in the next advancing movement of the carriage.

The cloth I) to be cut is laid in a pile at the left-hand or rear end of the machine. From thence it is carried up through a slot in the shaft R, Figs. 1 and 2, then along above the top of the machine, then down over a rail R at the right end, said rail having a slot with a locking-bar R in it to hold the cloth tight while being cut, the cloth which has been out being deposited in a pile beneath the said rail, as in- Fig. 1. The method of feeding the cloth is to set the shaft B so that the cloth will pass freely through the slot in it and then by hand draw the proper length over to the right-hand or front end of the machine and secure it by the locking-bar R the cloth being tightened by turning the shaft R by means of a bar applied to holes in the end of the shaft. The ratchet-wheel T and the pawl T will hold the shaft R when the cloth is properly tightened.

A-half-nut G, Fig. 4, has an internal screwthread cut in it to fit on the screw N, and an arm P has hubs V V fitting the screw N on opposite sides of the half nut G and'free to turn upon the screw N, the said half-nut being pivoted upon a pin or rod 2', fixed to lugs on said hubs V V. The arm P has an extension provided with an upright I-l, carryinga pin y at its upper end. ,On said pin is fitted the sleeve orhub of a swinging arm Ct, having pivotally mounted in its lower end the pin f, to which is attached the knife-sheath s. 'A square studm is inserted in the arm P to serve as a catch for the flattened or slabbedoff inner end of the pin fand hold it (see Fig. 5') so long as the knife occupies its normal or working position, as in Fig. 4, and until the said pin is turned by the catching of the point of the knife .9 in the cloth during the advancing movement of the carriage. When the point of the knife enters the cloth during the advance of the carriage, the resistance of the cloth acts to depress said point, thereby turning the knife, knife-sheath, and pin f so as to cause the flat side of the pin f to pass under the stud m. Then this happens, the arm a and the knife .9 will be thrown backwardly and upwardly, as shown by the dotted lines in Fig. 4, by means of the spring it, one end of which is attached to a pin 0 on projection H, while the other is made fast to the arm a. A spring-plate 0 is held by a stud j on a pin 3', fast in the outer end of the arm "P. The said plate 0 bears on the knife and holds it down so as to prevent rising or jumping thereof out of working position. A shoe p is held on a pin that screws up through the head of the pin 8. Said shoe 1) bears on the cloth in advance of the knife. It operates to hold the arm P up at the proper distance from the cloth to keep the knife in proper position for entering the loops. the point of the knife catches in the body of the cloth under the loops, it will be instantly turned down, so as to rotate its pivot-pin f in the lower end of the arm a, and the inner end of the said pivot-pin will be released from the pin m, so that the arm a and the knife will be thrown back by the spring it into the position shown in dotted linesin Fig. 4 and entirely released from the cloth without doing any injury to it.

In cutting the loops of weft pile fabrics should the knife stop and start at the same places every time there would be produced across the finished goods streaks that would injure their appearance. To avoid this, I employ means of varying the positions of the successive starting and stopping points. In the drawings I have shown an eccentric 3 Fig. 6, which is mounted on the stud o, carried by arm 1" of segment-gear M, the said eccentric having the eye of the-corresponding end of the rod n fitted on it. A four-toothed ratchet-disk W is connected with the said eccentric y, and a hooked pawl j is held on a stud on the frame in position to catch on IIC one of the teeth of said ratchet-disk at each upward movement of the arm 0. This takes place during each return movement of the knife-carriage E. The turning of the eccentric y will lengthen and shorten the distance between the centers of the studs 11 '0 at different strokes and cause the successive movements of the knife-carriage to begin and end at different points, as intended to be indicated by the diagram in Fig. 7. This entirely obviates the difficulty stated.

More than one knife can be operated on the screw N at one time, and by lifting the halfnut G of each knife-holder such knife-holder can be shifted and the knives set with regard to each other. By turning the screw by hand Whenever necessary, as by taking hold of the wheel P, the knife or knives can be set to accommodate any unusual variation in lateral spacing apart of the rows of loops.

The length of the carriage traverse can be made longer or shorter by moving the crankpin c, Fig. 1, out or in in the slot in the crankarm it.

What I claim is 1. In a weft-pile-cutting machine, the co1nbination of a frame to hold the cloth, a knifecarriage, ways for the carriage, a screw extending crosswise of the cloth and mounted in bearingsfon' said carriage, devices acting automatically at the close of a stroke of the carriage toro'tate said screw'intermittingly,

a nut fitted to the screw-threaded portion of said screw, a knife, and a knife carrying' arm gravitatin g toward the clot-h to press the knife against the latter and connected to move in unison with said nut crosswise of the cloth, with means to reciprocate said knife-carriage lengthwise of the machine, substantially as described,

2. In a machine of the class described, the combination of a frame to hold the cloth, with a knife-carriage, a knife, a knife-holclelga screw operating to feed the knife-holder and knife across the carriage, a wheel connected with said screw, a bar or rack, springs supporting said bar or rack, a cam-bar pivoted to said carriage and operating to depress said bar or rack clear of the wheel when the carriage is moving in one direction and to leave said rack up in position to engage and turn the wheel when the carriage is movingin the other direction, substantially as described.

3. The combination with a frame to hold the cloth, of a knife, a knife-carriage, means to reciprocate the said knife-carriage, and devices whereby automatically to vary the position of thelimits of the strokes of the knife, to break the regularity of the cuts and thereby guard against injury to the appearance of the cloth, substantially as described.

4. In a Weft-pile-cutting machine, the combination with a frame to hold the cloth, of a knife-carriage,a knife mounted on said knifecarriage, a driving-shaft, and operating devices intermediate said shaft and said carriage whereby to communicate a reciprocatory movement to said carriage, the said devices embracing as a portion thereof an eccentric connection and means to effect rotary whereby to vary the strokes of the carriage, substantially as described.

5. In a weft-pile-cutting machine, the com bination with a frame to hold the cloth, of a knife-carriage, a knife, a pulley, a rope attached to said carriage and pulley, a gear con- JOHN B. DAYMONT.

In presence of-- BENJ. ARNOLD, M. LAw'roN.

adjustment thereof, substantially as set forth,- 

